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ASME B16.48 Standard-Steel Line Blanks
ASME B16.48 standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for operating line blanks in sizes NPS 2 through NPS 24 for installation between ASME B16.5 flanges in the 150,300,600,900,1500,and 2500 pressure classes.The ASME B16.48 standard specifies the requirements for line blanks, also known as spectacle blinds, spades, and spacers. These components are essential in pipeline systems, particularly in industries like oil and gas, chemical processing, and power generation. They are used to isolate sections of a piping system during maintenance, inspection, or system modification.
The ASME B16.48 standard provides guidelines for:
- Materials: Specifies the materials suitable for manufacturing line blanks to ensure they can withstand pressure, temperature, and corrosive environments.
- Dimensions: Standardizes the dimensions for various line blank designs to ensure compatibility across different piping systems.
- Marking: Includes requirements for product marking to indicate material, size, and pressure rating for easy identification.
- Design and Pressure Ratings: Establishes pressure-temperature ratings for different materials to ensure safety and reliability in various operating conditions.
The standard applies to line blanks used with flanges that conform to ASME B16.5 or ASME B16.47 standards for flange dimensions.
Haihao Group can provide a variety ASME B16.48 standard flange,as follows:
- Dimensions of Class 150 Blanks for Use With Raised Face Flanges
- Dimensions of Class 300 Blanks for Use With Raised Face Flanges
- Dimensions of Class 600 Blanks for Use With Raised Face Flanges
- Dimensions of Class 900 Blanks for Use With Raised Face Flanges
- Dimensions of Class 1500 Blanks for Use With Raised Face Flanges
- Dimensions of Class 2500 Blanks for Use With Raised Face Flanges
- Dimensions of Class 150 Female Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 300 Female Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 600 Female Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 900 Female Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 1500 Female Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 2500 Female Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 150 Male Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 300 Male Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 600 Male Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 900 Male Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 1500 Male Ring-Joint Facing Figure-8 Blanks
- Dimensions of Class 2500 Male Ring-Joint Facing Figure-8 Blanks
Types of Line Blanks
ASME B16.48 defines three primary types of line blanks:
Stainless steel SS316 spectacle blind flange
Spectacle Blinds: Shaped like a pair of spectacles, with one side open (spacer) and the other side solid (blind). These are commonly used to temporarily isolate a section of a pipeline while keeping the open spacer available for future use.
ASTM A105 ASME B16.48 spade flanges
Spades: Solid plates used to completely block flow in a pipeline. They are often used when a section of the pipeline is permanently or temporarily isolated.
ASTM A240 316 316L Paddle Spacer
Spacers: Open rings or plates inserted in place of a spade or blind to allow fluid flow.
Pressure-Temperature Ratings
The pressure-temperature ratings specified in ASME B16.48 ensure that line blanks can withstand the conditions in which they are installed. These ratings are critical for selecting the appropriate line blank based on the operating conditions of the pipeline system.
Materials and Manufacturing
Materials used for line blanks must meet the requirements of ASME B16.48 and be compatible with the piping system’s operating conditions. Common materials include carbon steel, stainless steel, and alloy steel, chosen for their mechanical properties and corrosion resistance.
Manufacturing processes must adhere to strict quality standards, including dimensional accuracy, surface finish, and material integrity. Non-destructive testing (NDT) and inspection are often performed to ensure compliance with the standard.
Applications of ASME B16.48 Line Blanks
Line blanks conforming to ASME B16.48 are widely used in:
- Isolation of Equipment: During maintenance or replacement of equipment in a pipeline system.
- System Testing: For pressure or leak testing of specific sections of a pipeline.
- Emergency Shutdowns: To quickly isolate sections of a pipeline in case of an emergency.
Advantages of ASME B16.48 Compliance
- Safety: Ensures that line blanks can handle the specified pressure and temperature, reducing the risk of failure.
- Standardization: Facilitates interchangeability and compatibility across different piping systems.
- Reliability: Guarantees consistent performance in critical applications.
The ASME B16.48 standard is an essential guideline for manufacturers and users of line blanks. By adhering to this standard, Haihao Group and other industry leaders ensure that their products meet the highest levels of safety, quality, and performance. Whether for maintenance, system isolation, or testing, line blanks designed to ASME B16.48 provide a reliable solution for complex piping systems.
For more information about ASME B16.48 products or related inquiries, feel free to contact Haihao Group. Email:sales@haihaogroup.com